A river contains 8 mg/L DOC in molecules whose average composition is C10H15O4N. (a) What is...

Question

Question

A river contains 8 mg/L DOC in molecules whose average composition is C10H15O4N.

(a) What is the mass fraction of C in the organic molecules/

(b) What are the mass fraction and mole fraction of these molecules in solution?

Answer 1

Answer #1

Mass fraction of the element is the ratio of the total mass of the element divided by the mass of the molecule.

Mole fraction of the solute/solvent is the ratio of moles of solute/solvent divided by total no.of moles in the solution.

Answer 2

Similar Homework Help Questions

8. You prepare a 500 ml solution that contains 436 NOH The solution has a density...

8. You prepare a 500 ml solution that contains 436 NOH The solution has a density o has a measured density of 1.100 g/ml The density of 100 ml. and the density o NaOH is 2.13 g/cm. Complete the following table: Mass of Solute Moles of Solute Volume of Solute Mass of Solvent Moles of Solvent m (moles solute/kg solvent) Total Moles of Solution mole fraction NaOH Mass of Solution mole fraction H20 Volume of Solution ppm (mg solute/L solution)
A wastewater at pH 7.5 contains 45 mg/L SO4-S. (a) What fraction of the sulfate can...

A wastewater at pH 7.5 contains 45 mg/L SO4-S. (a) What fraction of the sulfate can be reduced to sulfide without causing the partial pressure of H2S in equilibrium with the solution to exceed 10-6 atm? Assume the solution is well-buffered at pH 7.5. (b) If the H2S partial pressure reached 10-6 atm and the solution contained 0.1 mg/L TOTZn, would you expect wurtzite [ZnS(s)] to precipitate?
What is the percent composition by mass of the solute of a sugar solution (sugar is...

What is the percent composition by mass of the solute of a sugar solution (sugar is C12H22O11) that has a mole fraction of the solute of 0.09816?

an average chocolate chip cooking contains 55.0 mg of salt (NaCl) how many molecules of salt...

an average chocolate chip cooking contains 55.0 mg of salt (NaCl) how many molecules of salt are normally found in an average chocolate chip cookie? Question 10 (3 points) An average chocolate chip cooking contains 55.0 mg of salt (NaCl). How many molecules of salt are normally found in an average chocolate chin cookie?!
part 1) An aqueous solution of magnesium nitrate, Mg(NO3)2, contains 2.03 grams of magnesium nitrate and...

part 1) An aqueous solution of magnesium nitrate, Mg(NO3)2, contains 2.03 grams of magnesium nitrate and 17.8 grams of water. The percentage by mass of magnesium nitrate in the solution is %. part 2) The mole fraction of lead acetate, Pb(CH3COO)2, in an aqueous solution is 1.80×10-2 . The percent by mass of lead acetate in the solution is %. part 3) An aqueous solution is 40.0 % by mass potassium bromide, KBr, and has a density of 1.37 g/mL. The mole...
2. a) What is the concentration of chlorine in mg/L of household bleach that contains 6...

2. a) What is the concentration of chlorine in mg/L of household bleach that contains 6 percent by weight of Cl2. Note the density of water is approximately 1,000 kg/m and specific gravity of Cl2 = 1.41 at 20 °C. b) If you are to use this bleach solution to treat 1,000 L water for disinfection, what is the volume of the bleach solution should you use to obtain a target chlorine concentration 1 mg/L?

Based on the figure below. 8 in the liquid is 0.8 (mole), what is the composition...

Based on the figure below. 8 in the liquid is 0.8 (mole), what is the composition of B in the vapor? What is the temperature in the vapor and liquid? 7. 130 -130 boiling poiat 110 90 90 bolling poiat A 70- 70 0 246&10 mole fraction
2. A groundwater contains 3.6 mg/L Fe+2 and 0.78 mg/L Mn+2. a. What dosage of ozone in mg/L is required to oxidize the...

2. A groundwater contains 3.6 mg/L Fe+2 and 0.78 mg/L Mn+2. a. What dosage of ozone in mg/L is required to oxidize the soluble iron and manganese. (Show balanced half reactions, balanced overall reactions, and stoichiometry derived from overall reactions). b. What mass concentration of solids is produced? c. Considering only the reaction of ozone and iron: If the pH is held constant at 6, the dissolved oxygen concentration is near saturation (assume 10 mg/L), and the residual ozone concentration...
What is the composition of a methanol (CH3OH) – propanol (CH3CH2CH2OH) solution that has a vapor...

What is the composition of a methanol (CH3OH) – propanol (CH3CH2CH2OH) solution that has a vapor pressure of 187 torr at 40°C? At 40°C, the vapor pressures of pure methanol and pure propanol are 303 and 44.6 torr, respectively. Assume the solution is ideal. Mole fraction of methanol = Mole fraction of propanol =

What is the composition of a methanol (CH3OH) – propanol (CH3CH2OH) solution that has a vapor...

What is the composition of a methanol (CH3OH) – propanol (CH3CH2OH) solution that has a vapor pressure of 126 torr at 40°C? At 40°C, the vapor pressures of pure methanol and pure propanol are 303 and 44.6 torr, respectively. Assume the solution is ideal. Mole fraction of methanol = Mole fraction of propanol =